Sewing-machine shuttle



(Model) J. TRIPP 81: J. H. OSBORN.

SEWING MACHINE SHUTTLE.

No. 259,439. Patented June 13, 1882.

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SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 259,439, dated June 13,1882.

' Application filed April 7, 1882. (Model) To all whom it may concern Beit known that we, JAMES TRIPP and JOHN H. OSBORN, of Cleveland, in thecounty of (luyahoga and State of Ohio, have invented a certain new andImproved Sewing-Machine Shuttle; and we do hereby declare that thefollowing is a full, clear, and complete description thereof.

Ourinvention relates to an improved shuttle for sewing-machines, thenature of which consists in the means employed for holding the bobbin,and to the mode ofthreading the shuttle and securing the desired tensionof the thread. I

That the construction and operation of the said shuttle may be morefully understood, reference will be had to the following specification,and to the annexed drawings, making part of the same, in which- Figure lis a side view of the shuttle; Fig. 2, a view of the opposite side ofFig. 1; Fig. 3, a detached view of the tension-spring; Fig. 4, a view ofthe opposite side of Fig. 3; Fig. 5, a detached view of thebobbin-holder; Fig. (3, a view of the bobbin and holder together; Fig.7, an edge view of the spring, Fig. 3; Fig. 8, a transverse section ofFigs. 3 and 4: in the direction of the line :0 a. Fig. 9 shows enlargeddetached sections of the spring and guard-plate in the direction of theline y y in Fig. 3.

Like letters of reference refer to like parts in the several views.

The drawings of the shuttle are enlarged for the purpose of more clearlyshowing the several parts. The general form of the shuttle is seen inFigsl and 2, and is hollow or tub'ular for the reception of the bobbinand its holder. To the exterior of the shuttle case or shell A, on oneside, is secured the spring B, Figs. 1, 3, and 4, the end 0 of whichenters the hole D and laps on the interior surface of the shell, theother end, E, being bent or curved down to fit into a recess, F, nearthe point, and held therein by a set-screw, as seen in Fig. 1.

The protection-plate G is connected to the outside of the spring B byriveting at H, or otherwise secured. The set-screw I passes through thisplate and the end of the spring, by which they are both togetherfastened to the shell of the shuttle. Springing down the end E intoplace and fastening it by means of the set-screw I, after the curved end0 has entered the hole D, causes the end to lap and clamp upon theinside of the shell, thus connecting and securing both ends of thespring to the shell. The said spring can be readily connected to anddetached from the shell by the set-screw I.

The bobbin-holder consists of a bar, J, with a head, K and K, at theends, as seen in Fig. 5. In the head K is a slot, a, and in the head K ahole, I), in which is inserted the pivot of one end of the bobbin L, thepivot at the other end of the bobbin being passed into the slot to. Thebobbin and holder will then be connected together, as seen in Fig. 6,which admits of an easy rotation of the bobbin upon its pivots, and alsoallows of its being readily connected to and detached from the holder byinserting one pivot of the bobbin in the hole I) and the other into theslot to.

When the filled bobbin and holder are connected they are inserted intothe chamber of,

the shell by entering the end K first, the bar J being at the same timepassed into the longitudinal slot M, Fig. 2, of the shell until the headK is flush with the heel. By this means the bobbin is held in the holderand rotates thereon within said chamber. The thread from the bobbin ispassed out through the spiral or curved slot N, Fig. 2, which has acurved or spiral course in the shell from N to N, Figs. 1 and 2. Thethread 0 takes this course from the bobbin, and then passes betweenprotection-plate G and spring B and out through the opening (I, Fig. 4,and then runs along between the spring B and the shell of the shuttle,as indicated at 0, Figs. 1 and 3. The tension of the thread is caused bythe pressure of thespring B upon the thread, which thread passes betweenthe said spring and shell of the shuttle to the loop of theneedle-thread in the usual way. The tension may be made more or less, asrequired, bymeans of the setscrew I. This arrangement of the severalparts of the shuttle admits of its being readily threaded by passing thethread a from the bobbin between the protection-plate G and the spring13, as indicated at c, Fig. 8, and over and around the point e to theopening d, as seen at 0, Fig. 4, then passing along between ICC theshell and the spring 13, as indicated at 0, Fig. 1, to the loop of theneedle-thread, as mentioned.

The point e is bent up from the line-face ot' the shuttle-shell into asmall indentation or depression in the under side of the protectionplateG, as indicated at f, Figs. 4, 8, and 9.

In Fig. 9 the guard-plate is represented as being separated from thespring 13 for the purpose of showing the relative position of the pointe in relation to the indentation e in the said plate G. By this meansthe thread is prevented from slipping back between the spring and shellover the point e, and the protectionplate G prevents any entanglement ofthe threads and spring in forming the stitch, and at the same timeadmits of the thread passing freely from the bobbin between the springand protection-plate to the needle-thread loop. The protecting-platealso prevents the loop of the needle-thread from catching in the point eof the spring B, Figs. 4 and 8, when sewing.

Theshuttle is designed to be operated in connection with asewing-machinein the ordinary way. No specially-constructed machine isrequired for the said shuttle. The holderJ and bobbin are held in placewithin the shell A, when in practical use, by means of the heel of theshuttle-carrier abutting against the head of the bobbinholder.

\Vhat we claim as our invention, and desire to secure by Letters Patent,is

1. In shuttles for sewing-machines, a detachablebobbin-holder consistingof two heads connected together by a bar arranged to slide in alongitudinal slot in the shuttle-shell, and provided with pivotalbearings for said bobbin in the heads of the holder, substantially asand for the purpose set forth.

2. In combination with a sewing-machine shuttle-case and bobbin, aholder having a slotted and a pivotalhead for carrying the said bobbin,and connected together. by a bar, J, adjusted to the longitudinal slotin the case, arranged substantially as and for the purpose set forth.

3. The shell or case A, provided with a longi tudinal slot, M, andspiral slot N, in combination with the bobbin and holder J,substantially as and for the purpose set forth.

4. In sewing-machine shuttles, the spring B, provided with a point, e,and opening d, in combination with the protector-plate Gr, having anindentation, f, for the said point, substantially as and for the purposeset forth.

5. A sewing-machine shuttle having a spiral slot, N, for thebobbin-thread, in combination with the spring B and protector-plate G,connected with the shell, substantially as and for the purpose setforth.

6. A sewing-machine shuttle consisting of the shell A, with alongitudinal and spiral slot therein, the bobbin and holder arrangedwithin said shell, in combination with the spring B andprotection-plate, substantially as and for the purpose set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

JAMES TRIPP. JOHN H. OSBORN.

Vitnesses:

J. H. BURRIDGE, W. H. BURRIDGE.

